Rotating Shaft and Electronic Device

This application is a continuation of International Application No. PCT/CN2024/083484, filed on Mar. 25, 2024, which claims priority to Chinese Patent Application No. 202311082908.7, filed on Aug. 28, 2023, both of which are incorporated herein by reference in their entireties.

This application relates to the field of electronic product technologies, and in particular, to a rotating shaft and an electronic device.

With the development of a foldable electronic device, a user has a relatively high requirement for a folding hand feeling and a hovering angle of the foldable electronic device. A conventional damping mechanism includes only one cam profile. This profile controls hand feelings during opening and closing of the folding device in a folded state and a flattened state, and controls a hovering design, which is difficult to adjust.

An objective of this application is to provide a rotating shaft and an electronic device, to adjust hand feelings during opening and closing and a hovering angle by using a combination of different profiles.

a mounting shaft; a rotating member, where the rotating member is rotatably connected to the mounting shaft and is in an axial direction of the mounting shaft, the rotating member is in sliding fit with the mounting shaft, a first mating gear tooth is disposed at a first end of the rotating member, and a second mating gear tooth is disposed at a second end of the rotating member; a first cam, disposed on the mounting shaft, where a first gear tooth is disposed on the first cam, the first gear tooth includes a first damping part, and a first included angle exists between the first damping part and a radial direction of the mounting shaft; and a second cam, disposed on the mounting shaft, where a second gear tooth is disposed on the second cam, the second gear tooth includes a hovering part, a second included angle exists between the hovering part and the radial direction of the mounting shaft, and the second included angle is greater than the first included angle; where the second mating gear tooth of the rotating member is in sliding contact with the second gear tooth of one second cam, and the first mating gear tooth of the rotating member is in sliding fit with the first gear tooth of one first cam, or is in sliding contact with the second gear tooth of another second cam. A first aspect of this application provides a rotating shaft, including at least one damping module, and the damping module includes:

Therefore, in this application, mating between the first cam and the second cam that have different profiles can simultaneously implement hand feeling feedback during opening and closing and a hovering function of the electronic device. In addition, cams of the two profiles can be separately designed according to corresponding functions, and design difficulty is low.

In a possible design, the second included angle is 10° ˜35°. In this angle range, the electronic device can implement hovering in a relatively large opening and closing angle range.

In a possible design, the first included angle is 0˜10°. In this angle range, the first damping part is relatively gentle, so that when mating between the first mating gear tooth of the rotating member and the first damping part on the first cam is implemented, there is a nearly constant damping force between the rotating member and the first cam, and the damping force is less than a damping force between the second mating gear tooth and the hovering part of the second cam. Therefore, not only a smooth folding action of the electronic device can be ensured to prevent jamming, but also a hovering effect can be ensured.

In a possible design, a length of the hovering part is greater than a length of the first damping part. A position at which the first damping part is in contact and mates with the first mating gear tooth corresponds to a part of an angle range in which the electronic device hovers. However, because a first angle is relatively small, it is difficult to obtain a good hovering effect by using mating between the first cam and the rotating member. Therefore, the hovering effect can be obtained by using mating between the second cam and the rotating member. In addition, the length of the hovering part is enabled to be greater than the length of the first damping part, and hovering can be implemented in a larger angle range.

In a possible design, the first gear tooth further includes a second damping part and a third damping part, the second damping part and the third damping part are respectively located on two sides of the first damping part, and are smoothly transitioned to the first damping part. Both the second damping part and the third damping part extend in a direction away from the rotating member, and a distance between the second damping part and the third damping part gradually increases from a side closer to the first damping part to a side away from the first damping part.

When a mating gear tooth on the rotating member passes through the second damping part and the first damping part, or passes through the first damping part and the third damping part, a sudden force change may be generated between the rotating member and the first cam, so that hand feelings fed back during opening and closing can be obtained.

In a possible design, the rotating shaft further includes a slider and an elastic member, the slider is connected to the mounting shaft, one end of the elastic member is connected to the first cam, and the other end of the elastic member is connected to the slider. The first cam is slidably connected to the mounting shaft. The second cam, the slider, and the mounting shaft may move synchronously to adjust a position of the second cam relative to the rotating member, to ensure that the second cam can keep in contact with the rotating member. In addition, the elastic member may push, through elastic deformation of the elastic member, the first cam to slide relative to the mounting shaft to ensure that the first cam can keep in contact with the rotating member, so that hand feelings during opening and closing can be obtained by providing a damping force by using the first cam, and a hovering function can be implemented in a large angle range.

In a possible design, the rotating shaft further includes a circlip, the circlip is fixedly sleeved onto the mounting shaft, the slider is disposed between the circlip and the elastic member, and two sides of the slider respectively abut against the circlip and the elastic member. The circlip may be fastened to the mounting shaft, so that limiting in the axial direction on the slider can be implemented. In addition, the elastic member is elastically deformed between the first cam and the slider, so that an axial position of the first cam is adaptively adjusted.

In a possible design, the mounting shaft includes a first shaft and a second shaft, the first shaft and the second shaft are disposed in parallel, the rotating member includes a first swing arm and a second swing arm, the first swing arm is rotatably connected to the first shaft, and the second swing arm is rotatably connected to the second shaft; and a first hole and a second hole are disposed on the first cam, the first cam is slidably sleeved onto the first shaft through the first hole, and the first cam is slidably sleeved onto the second shaft through the second hole, so that the first cam can slide relative to the mounting shaft. The first gear teeth are disposed on the first cam around the first hole and the second hole, a first mating gear tooth at a first end of the first swing arm is in sliding contact with the first gear tooth of the first cam around the first hole, and a first mating gear tooth at a first end of the second swing arm is in sliding contact with the first gear tooth of the first cam around the second hole. The first cam is an integrally formed structure, and can directly form the first hole, the second hole, and the first gear teeth around the first hole and the second hole in a forming process. Therefore, in a rotating process of the first swing arm and the second swing arm, a same force state exists between the first swing arm and the first cam and between the second swing arm and the first cam.

In a possible design, a third hole and a fourth hole are disposed on the second cam, the second cam is sleeved onto the first shaft through the third hole, and the second cam is sleeved onto the second shaft through the fourth hole, where a shaft shoulder or a circlip may be disposed on the first shaft and the second shaft, and the shaft shoulder or the circlip may be disposed on a side of the second cam facing away from the first cam, to implement limiting in the axial direction on the second cam, and the second cam can maintain a contact state with the shaft shoulder or the circlip by using a spring force provided by the elastic member, so that the second cam cannot slide relative to the mounting shaft but can move synchronously with the mounting shaft. The second gear teeth are disposed on the second cam around the third hole and the fourth hole, a second mating gear tooth at a second end of the first swing arm is in sliding contact with the second gear tooth of the second cam around the third hole, and a second mating gear tooth at a second end of the second swing arm is in sliding contact with the second gear tooth of the second cam around the fourth hole. The second cam is an integrally formed structure, and can directly form the third hole, the fourth hole, and the second gear teeth around the third hole and the fourth hole in a forming process. Therefore, in a rotating process of the first swing arm and the second swing arm, a same force state exists between the first swing arm and the second cam and between the second swing arm and the second cam.

In a possible design, a fifth hole and a sixth hole are disposed on the slider, the slider is sleeved onto the first shaft through the fifth hole, and the slider is sleeved onto the second shaft through the sixth hole. The slider may also be an integrally formed structure, so that a consistent state of connecting to the mounting shaft at the fifth hole and the sixth hole can be ensured, thereby improving consistency.

In a possible design, a plurality of damping modules are disposed, and some of the damping modules include the first cam and the second cam, and/or some of the damping modules include two first cams, and/or some of the damping modules include two the second cams. Therefore, the design and application of the structure of the damping module can be more flexible.

A second aspect of this application further provides an electronic device, where the electronic device includes a first body, a second body, and the rotating shaft provided in the first aspect of this application, and the first body and the second body are rotatably disposed on two sides of the rotating shaft respectively by using a rotating member in the rotating shaft.

The electronic device including the rotating shaft has a technical effect similar to that of the rotating shaft, and details are not described herein again.

It should be understood that the foregoing general descriptions and the following detailed descriptions are only examples, and cannot limit this application.

100 110 —damping module; 120 —structural member; —rotating shaft; 200 —first body; 300 —second body; 1 11 —first shaft; 12 —second shaft; —mounting shaft; 2 21 211 —first damping part; 212 —second damping part; 213 —third damping part; 214 —first rounded part; 215 —second rounded part; —first gear tooth; —first cam; 3 31 311 —hovering part; —second gear tooth; —second cam; 4 41 —first swing arm; 42 —second swing arm; 43 —first mating gear tooth; 44 —second mating gear tooth; —rotating member; 5 —slider 6 —elastic member; 7 —circlip; α—first included angle; β—second included angle; X—axial direction; Y—radial direction.

The accompanying drawings which are incorporated into this specification and constitute a part of this specification illustrate the embodiments consistent with this application and serve to explain the principles of this application together with this specification.

To make the objectives, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that specific embodiments described herein are merely used to explain this application, but are not intended to limit this application.

In the descriptions of this application, unless otherwise specified and defined explicitly, the terms “first” and “second” are merely intended for the purpose of description, and shall not be understood as an indication or implication of relative importance; unless otherwise specified or stated, the term “a plurality of” means two or more; and the terms such as “connection” and “fastening” should be understood in a broad sense. For example, the “connection” may be a fixed connection, a detachable connection, an integrated connection, or an electrical connection; or may be a direct connection or an indirect connection through an intermediate medium. A person of ordinary skill in the art may understand specific meanings of the foregoing terms in this application based on specific cases.

In the descriptions of the specification, it should be understood that the directional words such as “up” and “down” described in the embodiments of this application are described from perspectives shown in the accompanying drawings, and shall not be understood as a limitation on the embodiments of this application. In addition, in the context, it should be further understood that when it is mentioned that an element is connected to another element, the element can be directly connected to the another element, or may be indirectly connected to the another element through an intermediate element.

A foldable electronic device generally includes a screen and a rotating shaft, and a part of the screen on both sides of the rotating shaft may rotate relative to the rotating shaft, to implement screen folding or flattening. Generally, there is a damping module in the rotating shaft, and the damping module may provide a damping force in a folding process of the foldable electronic device, to feed back a hand feeling during folding and hovering at a folding angle to the user. Generally, a plurality of cams are disposed in the damping module, and profiles of the cams are consistent. The damping force is provided by using this profile to meet hand feelings during opening and closing of the foldable electronic device and a required hovering angle. However, a single profile usually meets only a design requirement of a damping force or a hovering angle, and it is difficult for a single profile to meet design requirements of both.

100 100 100 An embodiment of this application provides a rotating shaft. The rotating shaftmay be applied to an electronic device. The electronic device may be a device that has the rotating shaftand that can be folded relative to the rotating shaft, such as a foldable mobile phone or a foldable tablet computer. This embodiment sets no limitation on a type of the electronic device.

1 FIG. 2 FIG. 1 FIG. 2 FIG. 1 FIG. 2 FIG. 200 300 200 300 100 4 100 200 300 100 is a schematic diagram of the electronic device in a flattened state according to an embodiment of this application.is a schematic diagram of the electronic device in a folded state according to an embodiment of this application.andshow only examples in which the electronic device is a foldable mobile phone, and are used as examples for description. Referring toand, the electronic device includes a first bodyand a second body, and the first bodyand the second bodyare rotatably disposed on both sides of the rotating shaftby using a rotating memberin the rotating shaft. When the electronic device is a foldable mobile phone, the first bodyand the second bodyeach may be a middle frame of the foldable mobile phone, the middle frame may be covered with a flexible screen, and the flexible screen can be bent at a position corresponding to the rotating shaft.

100 110 110 In this embodiment, the rotating shaftincludes at least one damping module. There may be one or at least two damping modules, and may provide a damping force of the electronic device in a rotating process, to feed back hand feelings during opening and closing of the electronic device, and may further implement hovering of the electronic device when opened or closed to a proper angle.

3 FIG. 4 FIG. 3 FIG. 3 FIG. 4 FIG. 100 100 120 120 100 110 120 120 110 110 is a schematic structural diagram of the rotating shaftaccording to an embodiment of this application.is a front view of. Referring toand, the rotating shaftfurther includes a structural member. The structural membermay be a housing of the rotating shaft. The damping moduleis disposed on the structural member. The structural membermay provide a mounting environment for the damping module, and may further provide a protection effect for the damping module.

5 FIG. 6 FIG. 7 FIG. 5 FIG. 7 FIG. 110 110 110 110 4 4 200 300 110 4 4 200 4 300 200 300 100 4 4 200 300 is a schematic structural diagram of the damping modulein one angle of view according to an embodiment of this application.is a schematic structural diagram of the damping modulein another angle of view according to an embodiment of this application.is a front view of the damping moduleaccording to an embodiment of this application. Referring toto, the damping moduleincludes a rotating member, where the rotating membermay be connected to the first bodyor the second bodyof the electronic device. For example, in one damping module, at least two rotating membersmay be disposed, where at least one rotating membermay be connected to the first bodyof the electronic device, and at least one another rotating membermay be connected to the second bodyof the electronic device. Therefore, a connection between the first body, the second body, and the rotating shaftmay be implemented by using the rotating member, and flattening or folding of the electronic device may be implemented by using the rotating memberdriving relative rotation between the first bodyand the second body.

7 FIG. 110 1 4 1 4 100 1 4 2 3 1 1 1 1 2 3 4 4 2 3 2 3 4 4 2 2 1 2 1 4 4 3 3 1 4 3 4 1 2 3 Referring to, the damping modulefurther includes a mounting shaft. The rotating memberis rotatably sleeved onto the mounting shaft. The rotating memberhas only rotational motion in the rotating shaftwithout displacement, and the mounting shaftmay move relative to the rotating memberin an axial direction X. Both a first camand a second camare connected to the mounting shaft, the second cam may be relatively fixed to the mounting shaftand can move synchronously in the axial direction X with the mounting shaft, and relative sliding may occur between the first cam and the mounting shaft. A surface that is on a gear tooth of each of the first camand the second camand that is used to mate with the rotating memberis a curved surface. When the rotating memberis in contact with different positions on the gear teeth of the first camand the second cam, a distance between each of the first camand the second camand the rotating memberin the axial direction X is changed. In this case, when the rotating memberis in contact and mates with different positions of the first cam, the first camcan slide relative to the mounting shaft, the first cam, the mounting shaft, the rotating member, and the axial direction X at the same time. When the rotating memberis in contact and mates with different positions of the second cam, the second camand the mounting shaftmay move synchronously relative to the rotating memberin the axial direction X. In this way, the second cammay ensure that the rotating memberrotates relative to the mounting shaftwithout jamming and can ensure that damping force feedback during opening and closing of the entire device is implemented through contact with the first cam, and a hovering function is implemented through contact with the second cam.

7 FIG. 21 2 31 3 1 43 4 44 4 43 44 21 31 21 31 110 43 21 2 44 21 2 43 44 43 44 21 110 43 31 3 44 31 3 43 44 43 44 31 110 43 21 2 44 31 3 43 21 44 31 Referring to, a first gear toothis disposed on the first cam, and a second gear toothis disposed on the second cam. Along the axial direction X of the mounting shaft, a first mating gear toothis disposed at a first end of the rotating member, a second mating gear toothis disposed at a second end of the rotating member, and both the first mating gear toothand the second mating gear toothcan mate with one of the first gear toothand the second gear tooth. The first gear toothand the second gear toothhave different profiles. For example, in a same damping module, the first mating gear toothmay mate with the first gear toothof one first cam, and the second mating gear toothmay mate with the first gear toothof another first cam. In this case, the first mating gear toothand the second mating gear toothmay have a same profile. Certainly, the first mating gear toothand the second mating gear toothmay also have a same profile as the first gear tooth. For example, in a same damping module, the first mating gear toothmay mate with the second gear toothof one second cam, and the second mating gear toothmay mate with the second gear toothof another second cam. In this case, the first mating gear toothand the second mating gear toothmay have a same profile. Certainly, the first mating gear toothand the second mating gear toothmay also have a same profile as the second gear tooth. For example, in a same damping module, the first mating gear toothmay mate with the first gear toothof one first cam, and the second mating gear toothmay mate with the second gear toothof one second cam. In this case, the first mating gear toothmay have a same profile as the first gear tooth, and the second mating gear toothmay have a same profile as the second gear tooth.

2 21 43 4 31 44 4 3 110 2 3 110 110 100 100 110 2 3 110 2 110 3 100 110 2 110 3 3 FIG. 4 FIG. 8 FIG. 9 FIG. 8 FIG. 8 FIG. 9 FIG. The first camcan provide a damping force for the electronic device through mating between the first gear toothand the first mating gear toothon the rotating member, to feed back hand feelings during opening and closing to the user. Through mating between the second gear toothand the second mating gear toothon the rotating member, the second camcan enable the electronic device to implement folding hovering within a specific angle range. For example, referring toand, when one damping moduleincludes both the first camand the second cam, hand feelings during opening and closing of the entire device and a hovering function can be met by using one damping module. Certainly, a plurality of damping modulesmay be applied to the rotating shaftto improve overall hand feelings during opening and closing and a hovering effect. For example,is another schematic structural diagram of the rotating shaftaccording to an embodiment of this application.is a front view of. Referring toand, when a damping moduleincludes only the first camor the second cam, at least one damping moduleincluding only the first camand at least one damping moduleincluding only the second cammay be used in combination in the rotating shaft. The damping moduleincluding only the first cammeets a requirement of the hand feelings during opening and closing of the entire device, and the damping moduleincluding only the second cammeets the hovering function of the entire device. Therefore, the hand feelings during opening and closing of the entire device and the hovering function may also be implemented at the same time.

10 FIG. 10 FIG. 11 FIG. 11 FIG. 2 21 211 211 1 3 31 311 311 1 is a schematic diagram of a profile of the first camaccording to an embodiment of this application. Referring to, the first gear toothincludes a first damping part, and a first included angle α exists between the first damping partand a radial direction Y of the mounting shaft.is a schematic diagram of a profile of the second camaccording to an embodiment of this application. Referring to, the second gear toothincludes a hovering part, a second included angle β exists between the hovering partand the radial direction Y of the mounting shaft, and the second included angle β is greater than the first included angle α.

110 2 3 4 2 43 211 2 21 212 213 212 213 211 211 212 213 4 212 213 211 211 211 212 213 211 212 213 4 4 12 FIG. 12 FIG. For ease of description, that the damping moduleincludes both the first camand the second camis used as an example for description. In a process in which the electronic device switches from a folded state to a flattened state, for a process in which the rotating membermates with the first cam, the first mating gear toothcan respectively obtain different force feedback before and after contact with the first damping part, to implement different hand feelings during opening and closing. For example,is a schematic diagram of a profile of the first camaccording to an embodiment of this application. Referring to, the first gear toothfurther includes a second damping partand a third damping part, and the second damping partand the third damping partare respectively located on two sides of the first damping part, and are smoothly transitioned to the first damping part. Both the second damping partand the third damping partextend in a direction away from the rotating member, and a distance between the second damping partand the third damping partgradually increases from a side closer to the first damping partto a side away from the first damping part. There is no definite boundary between the first damping part, the second damping part, and the third damping part, and the first damping part, the second damping part, and the third damping partmay form a complete continuous gear tooth surface. For ease of description in this embodiment, the gear tooth surface is divided into the foregoing three damping parts, and each damping part has at least a part of position that can contact a mating gear tooth on the rotating member, to provide a corresponding damping force for the rotating member.

12 FIG. 214 211 212 214 211 212 215 211 213 215 211 213 212 213 211 Referring to, a first rounded partexists between the first damping partand the second damping part. The first rounded partmay cause an included angle between the first damping partand the second damping partin an extension direction. Similarly, a second rounded partexists between the first damping partand the third damping part. The second rounded partmay cause an included angle between the first damping partand the third damping partin an extension direction, that is, a slope of each of the second damping partand the third damping partis relatively steep, and a slope of the first damping partis relatively gentle.

13 FIG. 12 FIG. 13 FIG. 100 2 43 4 212 212 212 43 4 100 43 211 214 211 2 4 43 214 100 100 is a diagram of a torsion curve of the rotating shaftin a case where only the first camis included according to an embodiment of this application. Referring toand, when the electronic device rotates from the folded state to the flattened state, the first mating gear toothon the rotating memberfirst contacts the second damping part. Because a slope of the second damping partis relatively large, a damping force between the second damping partand the first mating gear toothof the rotating memberis relatively large, and a torsion force of the rotating shaftis relatively large. When the electronic device is opened by an angle, the first mating gear toothcontacts the first damping partafter crossing the first rounded part. Because a slope of the first damping partis relatively small, the damping force between the first camand the rotating memberchanges greatly after the first mating gear toothpasses through the first rounded part. That is, the damping force decreases, and the torsion force of the rotating shaftdecreases. A sudden torsion force change of the rotating shaftmay feed back hand feelings during opening and closing for the first time to the user, and the hand feeling represents a hand feeling when the electronic device starts to expand the electronic device.

43 211 211 4 2 As the electronic device continues to expand towards the flattened state, the first mating gear toothis in sliding contact with the first damping part. Because the slope of the first damping partis relatively gentle, the damping force between the rotating memberand the first camis relatively stable.

43 213 215 213 2 4 43 215 When the first mating gear toothis in contact with the third damping partafter crossing the second rounded part, because a slope of the third damping partis relatively large, a damping force between the first camand the rotating memberchanges greatly after the first mating gear toothpasses through the second rounded part, so that hand feelings during opening and closing for the second time can be fed back for the user, and the hand feeling represents a hand feeling when the electronic device is about to complete flattening.

43 2 43 21 In addition, when the electronic device switches from the flattened state to the folded state, a movement path of the first mating gear toothon the first camis reversed. A state of a force between the first mating gear toothand the first gear toothat a corresponding mating position is similar to a state of a force when the electronic device switches from the folded state to the expanded state described above, and details are not described herein again.

14 FIG. 14 FIG. 14 FIG. 14 FIG. 100 2 3 100 2 100 2 100 2 3 4 3 44 4 31 3 43 211 31 44 100 is a schematic diagram of comparison between a torsion curve of the rotating shaftthat includes both the first camand the second camand a torsion curve of the rotating shaftthat includes only the first cam. Horizontal coordinates indicate an angle, vertical coordinates indicate a torsion, a curve a is a torsion curve of the rotating shaftthat includes only the first cam, and a curve b is a torsion curve of the rotating shaftthat includes both the first camand the second cam. Referring to, for a process in which the rotating membermates with the second cam, in a process in which the electronic device moves from the folded state to the flattened state, the second mating gear toothof the rotating memberkeeps mating with the second gear toothof the second cam. Because the second included angle β is greater than the first included angle α, in an entire process of the first mating gear toothmating with the first damping part, a greater friction force can be generated between the second gear toothand the second mating gear tooth, and the rotating shaftgenerates a relatively large torsion (referring to a part of the curve b inthat is corresponding to horizontal coordinate angles 60° ˜120°). That is, referring to, in the horizontal coordinate angles 60° ˜120°, torsions corresponding to the curve b are greater than torsions corresponding to the curve a, so that the electronic device can implement hovering in a relatively large folding angle range.

2 3 Therefore, through mating between the first camand the second camthat have different profiles, hand feeling feedback during opening and closing and a hovering function of the electronic device can be simultaneously implemented. In addition, cams of two profiles can be separately designed according to corresponding functions, and design difficulty is low.

In an embodiment, the second included angle β may be 10° ˜35°, and the electronic device can implement hovering within this angle range in a relatively large opening and closing angle range. Optionally, the second included angle β may be 10°, 15°, 20°, 25°, 30°, or 35°, which helps the electronic device to implement hovering within an angle range of 60° ˜120°.

211 43 4 211 2 4 2 44 311 3 In an embodiment, the first included angle α may be 0˜10°. In this angle range, the first damping partis relatively gentle, so that when mating between the first mating gear toothof the rotating memberand the first damping partof the first camis implemented, there is a nearly constant damping force between the rotating memberand the first cam, and the damping force is less than the damping force between the second mating gear toothand the hovering partof the second cam, thereby ensuring a smooth folding action of the electronic device, avoiding jamming, and ensuring a hovering effect. Optionally, the first included angle α may be 3°, 5°, 8°, or 10°.

311 211 43 2 4 3 4 311 211 In an embodiment, a length of the hovering partis greater than a length of the first damping part, where a position at which a first damping layer is in contact and mates with the first mating gear toothcorresponds to a part of an angle range in which the electronic device needs to hover. However, because a first angle is relatively small, it is difficult to obtain a good hovering effect depending on mating between the first camand the rotating member. Therefore, a hovering effect can be obtained through mating between the second camand the rotating member. In addition, the length of the hovering partis enabled to greater than the length of the first damping part, so that hovering can be implemented in a larger angle range, for example, hovering can be implemented within an angle range of 60° ˜120°.

5 6 5 1 6 2 6 5 2 1 6 In an embodiment, a sliderand an elastic memberare further included. The slideris connected to the mounting shaft, one end of the elastic memberis connected to the first cam, and the other end of the elastic memberis connected to the slider. The first camis slidably connected to the mounting shaft. For ease of mounting and disposing, the elastic membermay be a spring.

5 1 5 1 3 1 3 5 1 2 1 6 4 21 31 3 5 1 3 4 3 4 6 2 1 2 4 2 A position of the slideron the mounting shaftis relatively fixed, and the slidercan move synchronously with the mounting shaft. Because a position of the second camon the mounting shaftis also relatively fixed, the second cam, the slider, and the mounting shaftmay move synchronously. The first cammay slide relative to the mounting shaftunder action of an elastic force of the elastic member. When the mating gear teeth on the rotating memberare in contact and mate with different parts of the corresponding first gear toothand second gear tooth, the second cam, the slider, and the mounting shaftmay adjust a position of the second camrelative to the rotating memberby moving synchronously, to ensure that the second camcan keep in contact with the rotating member. In addition, the elastic membermay push, through elastic deformation, the first camto slide relative to the mounting shaft, to ensure that the first camcan keep in contact with the rotating member, so that a damping force can be provided by the first camto obtain hand feelings during opening and closing, and a hovering function can be implemented in a large angle range.

7 FIG. 100 7 7 1 5 7 6 5 7 6 7 1 5 6 2 5 2 In an embodiment, referring to, the rotating shaftfurther includes a circlip, the circlipis fixedly sleeved onto the mounting shaft, the slideris disposed between the circlipand the elastic member, and two sides of the sliderrespectively abut against the circlipand the elastic member. The circlipmay be fastened to the mounting shaft, to implement limiting in the axial direction X of the slider. In addition, the elastic memberis facilitated to be elastically deformed between the first camand the slider, thereby facilitating adaptive position adjustment of the first camin the axial direction X.

7 FIG. 1 11 12 11 12 4 41 42 41 11 42 12 41 42 1 41 42 1 41 200 300 42 200 300 41 42 2 2 11 2 12 2 1 21 2 43 41 21 2 43 42 21 2 2 21 41 42 41 2 42 2 In an embodiment, referring to, the mounting shaftincludes a first shaftand a second shaft, the first shaftand the second shaftare disposed in parallel, the rotating memberincludes a first swing armand a second swing arm, the first swing armis rotatably connected to the first shaft, and the second swing armis rotatably connected to the second shaft. A position of the first swing armand a position of the second swing armin the electronic device are unchanged along the axial direction X of the mounting shaft, and the first swing armand the second swing armcan rotate only by using a corresponding mounting shaftas a center. The first swing armmay be connected to one of the first bodyand the second bodyin the electronic device, and the second swing armis connected to the other, so that opening and closing of the first bodyand the second bodycan be implemented by using the first swing armand the second swing arm. A first hole (not shown in the figure) and a second hole (not shown in the figure) are disposed on the first cam, the first camis slidably sleeved onto the first shaftthrough the first hole, and the first camis slidably sleeved onto the second shaftthrough the second hole, so that the first camcan slide relative to the mounting shaft. The first gear teethare disposed on the first camaround the first hole and the second hole, a first mating gear toothat a first end of the first swing armis in sliding contact with the first gear toothof the first camaround the first hole, and a first mating gear toothat a first end of the second swing armis in sliding contact with the first gear toothof the first camaround the second hole. The first camis an integrally formed structure, and can directly form the first hole, the second hole, and the first gear teetharound the first hole and the second hole in a forming process. Therefore, in a rotating process of the first swing armand the second swing arm, a same force state exists between the first swing armand the first camand between the second swing armand the first cam.

3 3 11 3 12 11 12 3 2 3 3 6 3 1 1 31 3 44 41 31 3 44 42 31 3 3 31 41 42 41 3 42 3 In an embodiment, a third hole (not shown in the figure) and a fourth hole (not shown in the figure) are disposed on the second cam, the second camis sleeved onto the first shaftthrough the third hole, and the second camis sleeved onto the second shaftthrough the fourth hole. A shaft shoulder or a circlip may be disposed on the first shaftand the second shaft, and the shaft shoulder or the circlip may be located on a side of the second camfacing away from the first cam, to implement limiting in the axial direction on the second cam, and the second camcan keep contact with the shaft shoulder or the circlip by using the elastic member, so that the second camcannot slide relative to the mounting shaft, and can move synchronously with the mounting shaft. The second gear teethare respectively disposed on the second camaround the third hole and the fourth hole. A second mating gear toothat a second end of the first swing armis in sliding contact with the second gear toothof the second camaround the third hole, and a second mating gear toothat a second end of the second swing armis in sliding contact with the second gear toothof the second camaround the fourth hole. The second camis an integrally formed structure, and can directly form the third hole, the fourth hole, and the second gear teetharound the third hole and the fourth hole in a forming process. Therefore, in a rotating process of the first swing armand the second swing arm, a same force state exists between the first swing armand the second camand between the second swing armand the second cam.

5 5 11 5 12 7 5 1 In an embodiment, a fifth hole (not shown in the figure) and a sixth hole (not shown in the figure) are disposed on the slider, the slideris sleeved onto the first shaftthrough the fifth hole, and the slideris sleeved onto the second shaftthrough the sixth hole. Specifically, an interference fit manner may be used, or the circlipmay be used for assisting in fastening. The slidermay also be an integrally formed structure, so that a consistent state of connecting to the mounting shaftat the fifth hole and the sixth hole can be ensured, thereby improving consistency.

The foregoing descriptions are merely preferred embodiments of this application, and are not intended to limit this application. A person skilled in the art may make various modifications and changes to this application. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of this application shall fall within the protection scope of this application.